tempo_map_importer.cc

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/*
    Copyright (C) 2008 Paul Davis
    Author: Sakari Bergen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "ardour/tempo_map_importer.h"

#include <sstream>

#include "ardour/session.h"
#include "ardour/tempo.h"
#include "pbd/failed_constructor.h"

#include "i18n.h"

using namespace std;
using namespace PBD;
using namespace ARDOUR;

/**** Handler ***/
TempoMapImportHandler::TempoMapImportHandler (XMLTree const & source, Session & session) :
  ElementImportHandler (source, session)
{
        XMLNode const * root = source.root();
        XMLNode const * tempo_map;

        if (!(tempo_map = root->child (X_("TempoMap")))) {
                throw failed_constructor();
        }

        elements.push_back (ElementPtr ( new TempoMapImporter (source, session, *tempo_map)));
}

string
TempoMapImportHandler::get_info () const
{
        return _("Tempo map");
}

/*** TempoMapImporter ***/
TempoMapImporter::TempoMapImporter (XMLTree const & source, Session & session, XMLNode const & node) :
  ElementImporter (source, session),
  xml_tempo_map (node)
{
        name = _("Tempo Map");
}

string
TempoMapImporter::get_info () const
{
        std::ostringstream oss;
        unsigned int tempos = 0;
        unsigned int meters = 0;
        XMLNodeList children = xml_tempo_map.children();

        for (XMLNodeIterator it = children.begin(); it != children.end(); it++) {
                if ((*it)->name() == "Tempo") {
                        tempos++;
                } else if ((*it)->name() == "Meters") {
                        meters++;
                }
        }

        // return info
        oss << _("Tempo marks: ") << tempos << _("\nMeter marks: ") << meters;

        return oss.str();
}

bool
TempoMapImporter::_prepare_move ()
{
        // Prompt user for verification
        boost::optional<bool> replace = Prompt (_("This will replace the current tempo map!\nAre you sure you want to do this?"));
        return replace.get_value_or (false);
}

void
TempoMapImporter::_cancel_move ()
{
}

void
TempoMapImporter::_move ()
{
        session.tempo_map().set_state (xml_tempo_map, Stateful::current_state_version);
}